A "lunar month" is 29.5 days, so with the traditional school year, you are in school about 10 lunar months each year.
Sunspot cycles are 10 to 12 years in length.
A solar year lasts approximately 365.24 days. A lunar year lasts 354.37 days. The difference between the two is 10.87 days, or 10 days, and nearly 21 hours.
The Apollo 9 was the first to test a lunar module in space. Apollo 10 tested the lunar module in lunar orbit.
1. Apollo 7: Low Earth Orbit 2. Apollo 8: Lunar Orbit 3. Apollo 9: Low Earth Orbit 4. Apollo 10: Lunar Orbit 5. Apollo 11: Lunar Landing 6. Apollo 12: Lunar Landing 7. Apollo 13: Lunar flyby (aborted landing) 8. Apollo 14: Lunar Landing 9. Apollo 15: Lunar Landing 10. Apollo 16: Lunar Landing 11. Apollo 17: Lunar Landing
No. During the 5000-year period 2000 BCE to 3000 CE, there have been / will be a total of 12,064 lunar eclipses ... an average of about 2.4 per year. During the 10-year period 2001 to 2010, there are 24 lunar eclipses ... also 2.4 per year. There were 3 lunar eclipses in 2001, and 4 lunar eclipses in 2009. December 21, 2010 is/was the second lunar eclipse of 2010. So over the long term, you're looking at between 2 and 3 lunar eclipses every year.
A "lunar month" is 29.5 days, so with the traditional school year, you are in school about 10 lunar months each year.
Sunspot cycles are 10 to 12 years in length.
It changes. There are three lunar eclipses on December 10, 2011, June 4 and November 28, 2012. Over a period of several years, solar and lunar eclipses both average about 2.3 per year, but anything up to 5 in a year is possible.
according to my text book "10^9 cycles per second. "
sunspots
sunspots
1000 Hz means 1000 cycles per second, which is more than 10 cycles per second. Please note that this has nothing to do with "fast" in the sense of "speed".
A solar year lasts approximately 365.24 days. A lunar year lasts 354.37 days. The difference between the two is 10.87 days, or 10 days, and nearly 21 hours.
Hz means Hertz. One complete cycle per second. 10 hertz would be ten cycles per second.
THz stands for Tera-Hertz which is equivalent to 10^12 Hertz (cycles per second).
Giga - 10 is to 9 Tera - 10 is to 12 Peta - 10 is to 15 Exa - 10 is to 18 Zetta - 10 is to 21 Yotta - 10 is to 24